Pin-locking means



Oct. 4, 1927.

w. w. SWAYZE PIN'LOCKING MEANS Filed Aug. 50. 1922 Fatented Get. 4,IQZ'T.

- UNITED TATES 'WILLIA'M .w. SWAYZE, or winia neron, D sney/vans.

PIN-LOCKING MEANS.

Application filed August 30, 1922. Serial noifssazvs.

One object of this invention is to provide relatively simple, effectiveand substantial means for retaining and looking a pin in a body orstructure in which it is inserted, and more particularly for immovablyholding in place the pin connecting a hammer bar or arm with a hammerhead or tip.

It is further desired to provide a novel retaining or locking device ofthe above type which shall be of such construction as to permit of itsready assembly and also of its convenient disassembly when it isdesirable to remove and renew the hammer tip or head.

These objects and other advantageous ends I attain as hereinafter setforth, reference being had to the accompanying drawings, in which,

Fig. 1 is a side elevation of a hammer bar and head, showing myinvention as applied thereto;

Fig. 2 is a horizontal section on the line 22, Fig. 1, and

Fig. 3 is an end elevation of the preferred form of pin forming part ofmy invention.

In the drawings, 1 represents a hammer head or tip such as iscustomarily used in hammer crushers or pulverizers and this is cored toprovide a recess 2 of substantially rectangular section for thereception of an elongated hammer bar 8; there being two aligned andpreferably circular holes in said head opening into said recess. At eachend of the hammer bar is formed a circular hole 15, and a pin tis-provided for coupling the bar to the head when said bar has beeninserted in the recess 2. The pin 4 has an outwardly extending flange 5at one end, and one face of the-hammer head 1 is recessed at '6concentrically with the aligned holes for the pin to a depth preferablyabout double the thickness of said flange 5.

Projecting into this recess 6 from the wall thereof are three or anyother suitable number of radially extending lugs 8 placed in the presentcase 120 apart, and the flange of the pin is formed with three notchesor recesses 7 to accommodate the lugs 8 and permit of its entrance intothe recess 6 when the pin is-inserted in the aligned holes in the hammerhead to couple this to a hammer bar extending into the cavity 2. Thelugs 8 are so positioned that after the pin has been fully inserted inthe hammer head, it may be rotated without interference by the lugs withits flange and this latter is also formed with a number of depressions 9in its outer face the same angular distance apart as the notches 7 andlugs 8.

- As a consequence of this construction when the pin is inserted tocouple the hammer bar to the hammer head, its flange 5 may be sopositioned as'to permit the lugs 8 to pass through the recesses 7 andthus allow said flange to be seated on the bottom or inside face of therecess 6 undersaid lugs. By means of a suitable tool inserted in apassage or cavity 10' in the pin, the lattermay now be turned through anangle of 60 for example, so that the depressions 9 are broughtimmediately under the lugs 8. The latter are now hammered Clown intosaid depressions with the result that the pm is held from rotation andat the same time is also effectually prevented from movinglongitudinally out of-its given position in which it connects the hammerhead and hammer bar.

Even though the hammer be subjected to the rough usage andwear incidentupon the,

work of a hammer crusher or pulverizer, it is a practicalimpossibilityfor the pin to become dislodgedor to move into such position as tothereafter slide longitudinally out of its coupling position. If howeverby reason of wear of the hammer head, it is desirable that it shall beremoved and renewed, the lugs 8 may be forced out of the depressions 9by the use of a suitable tool, after which the pin may be turned by asuit.- able member inserted in its squared or other than circularpassage 10 until its notches 7 are aligned with the .lugs 8. Thereaftersaid pin may be forced longitudinally out of the hammer head, which maythen be removed from the hammer bar and replaced by a new head fixed inplace as above described.

From the above description it will be seen that my pin-retaining deviceis of the simplest construction, involving no elements other than thetongues 8 which are integral with the hammer head and the flange of thepin ;'it being understood that the metal of a pin rotatably fitting intothe hole, said 7 pin having a flanged head recessed to allow the head topass the lug when the pin is inserted in the hole, saidhead having anadditional recess in its outer face to providev a seat into which thelug may be bent.

2. The combination of an elenienthaving I a, pin-hole therein with a pinin the hole, the

pin having a notched flange formed to permit its insertion whenoccupying a predetermined position relatively to the element, theelement being provided with a part capable of being bent into adepression in the pin to prevent the rotation and longitudinal movementof the pin.

3. The combination of an element provided with an opening therein andhaving an enlarged recess at one end of the opening and an integral lugextending into the recess at a spaced distance from the bottom thereof,with a pin in said opening, said pin having a head located in therecess, the head having a notchin its periphery to permit the passage ofthe head past the lug and having an additional recess in its head at oneside of the peripheral recess so that when the pin is partly turned thelug can be plreser-d into the additional recess in the hea v.

\VILLIAM XV. 'SXVAYZE.

